Rockville RockGhost V2 Powered 11 Inch 800W Car Subwoofer Fits Inside Spare Tire is a powerful and compact subwoofer that fits perfectly inside your spare tire. This means you can enjoy great-sounding bass in your car without taking up any trunk space. The built-in amplifier makes installation clean and simple. With 800 watts of peak power and 200 watts of RMS power, this subwoofer will deliver deep, clear bass that will make your music come alive.